JP2580615Y2 - Paper thickness abnormality detection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a thickness abnormality of a paper sheet applied to a paper money processing machine such as a paper money receiving machine and a paper dispensing machine, and a paper money processing machine such as a slip and a check.

[0002]

2. Description of the Related Art As a conventional sheet thickness abnormality detecting apparatus, as represented by, for example, the apparatus described in Japanese Patent Application Laid-Open No. 55-115534, the conventional technique is paper sheet. Is detected as one or two sheets, and when it is detected as two sheets, it is almost all abnormal.

As the detecting means, a pair of rollers are disposed to face each other, and one of the rollers is configured to be able to be separated from the urging means such as a spring. As a result, the amount of displacement of one of the rollers is increased by a lever that supports the roller, and the increased amount of displacement is detected by a detecting unit. The technology described in the above-mentioned publication is configured to be able to handle paper sheets of various thicknesses by configuring the detection means with subdivided detection elements.

On the other hand, in recent years, there has been a demand not only for detecting the overlap of two paper sheets but also for detecting partially thick paper sheets such as tapes attached to the paper sheets. In order to respond to this, the size of the abnormal thickness portion is detected by measuring the length at which data equal to or greater than a predetermined threshold value (Threshold Level) is detected based on the data detected by the detection means, When the size is less than the length of one sheet, there is a case where an abnormal sheet with a tape or the like is detected as an abnormal sheet.

[0005]

However, as in the prior art, the amount of displacement of a roller detected when a sheet passes between rollers which are biased by a spring and oppose each other is the amount of sheet displacement. Since the roller jumps up at the moment when the thickness of the type becomes thick, the data of the displacement amount abnormality of the roller which should correspond to the actual thickness is detected for a moment. This is called impact data. The magnitude of the impact data is proportional to the amount of change in thickness and the rush speed of the paper sheet, but the influence of the urging force of the spring urging the roller is the largest. In other words, the greater the urging force of the spring, the smaller the impact data.

On the other hand, if the biasing force of the spring is too large,
It becomes difficult for the leading end of the paper sheet to enter between the rollers, the probability of occurrence of paper jam increases, and the tapes attached to the paper sheet are crushed, so that true thickness data cannot be detected. For this reason, the biasing force of the spring cannot be so strong, and it has been considered that there is no help for detecting the impact data to some extent.

From the above, as shown in FIG. 6 in the column of "Prior Art", the detection data is shown, for example, as shown in FIG.
FIG. 6 shows a case where a 50 μm thick tape T having a width of 2 mm is stuck and a case where a corner Pa of a 85 μm thick banknote P is broken by about 5 mm as shown in FIG. As shown in the column, the detection lengths D and D of the data at the predetermined threshold value TH are the same, and the two cannot be distinguished.

In general, in the case of a banknote handling machine, the banknote to which the tape T has been attached must always be detected as an abnormal banknote. Often treated as. In that regard, in the conventional technology, since the setting is to detect bills attached to the tape, even a square-folded bill that should be treated as a normal bill is also detected as an abnormal bill, and it is necessary to sort both manually later. It took a lot of trouble.

In view of the foregoing, it is an object of the present invention to provide a sheet thickness abnormality detecting apparatus which can distinguish and detect a tape-attached sheet and a corner-folded sheet. .

[0010]

As a means for solving the problems of the above-mentioned prior art, the present invention has a pair of rollers which are provided so as to be able to be displaced from each other, and a paper sheet passing between these rollers. Displacement amount detecting means for detecting a displacement amount of a roller which is displaced in accordance with the thickness of the sheet, and thickness abnormality determining means for determining a sheet thickness abnormality based on detection data detected by the displacement amount detecting means. In the sheet thickness abnormality detecting device, the gap between the pair of rollers of the displacement amount detecting means is such that a tape or the like thinner than the thickness of one sheet is attached to the thickness of one sheet. First urging means for urging the two rollers in a direction approaching each other until a gap of about one and a half sheets corresponding to the thickness of one plus tape, and a gap between the rollers being a gap of about one and a half sheets When the first urging means is further expanded Characterized in that allowed and a second biasing means biases.

[0011]

When the paper that has entered between the pair of rollers is a tape-attached paper, the rollers are maintained until a gap of about one and a half sheets corresponding to one sheet of paper plus the thickness of the tape is reached. Since the displacement is made only against the urging force of the first urging means, the data of the tape can be detected without crushing the tape. On the other hand, when the thickness becomes larger than the actual thickness (more than the gap of about one and a half sheets) by the impact at the time of feeding
Since the urging force of the second urging means is also applied, the impact data becomes smaller, and the presence of the tape over the length in the detection direction is detected.

[0012] If the paper sheet that has entered between the rollers is a square-folded paper sheet of about 5 mm, the amount of displacement of the roller will be greater than in the case of the above-mentioned tape application. In addition, the actuator is displaced against the urging force of the second urging means, and the urging force is increased to suppress the projection of the impact data. It is detected that there is.

[0013] Thus, a distinction can be made between tape application and corner folding, which can contribute to eliminating only tape application paper sheets.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 shows the appearance of one embodiment of the thickness abnormality detecting device according to the present invention, and FIG. 2 shows the right side surface.

In this thickness abnormality detecting device, two rollers 3 and 4 are provided between the left and right frames 2 and 2 of the machine frame 1 so as to face each other, and the lower roller 4 is arranged in the vertical direction. The support position of the upper roller 3 is adjustable and supported rotatably, and the shaft 5 of the upper roller 3 is fitted into a vertically long slot 6 formed in the frames 2 and 2 so as to be vertically displaceable.
The rollers 3 and 4 are both provided with a driving force in the direction of the arrow through a transmission mechanism (not shown).

The rollers 3 are provided at both ends of the upper roller 3.
Displacement amount detecting means for detecting the amount of displacement upward is provided. In the illustrated embodiment, a rotating body 7 such as a bearing is provided at the end of a shaft 5 of the upper roller 3 as shown in FIGS. 1 and 3, and a detection lever pivotally supported by a shaft 8 on the frame 2. The lower surface of the rotary member 7 is in contact with the lower surface of the shaft 9 at a distance L1 from the center of the shaft 8. One end of the detection lever 9 on the roller 3 side is connected to the frame 2 side. Spring 1 which constitutes the first urging means fixed to
0 is fixed at the other end.

A lower surface of the opposite end of the detection lever 9 at a distance L2 from the shaft 8 is attached to the frame 2 with a screw 11
The upper end of a contact rod 14 movably supported up and down by a bearing 13 mounted so that the position can be adjusted by the and the long hole 12. The contact rod 14 is a stopper 15 such as an E-ring. A spring 16 that constitutes a second urging means is interposed between the head 13a at the upper end and the bearing 13 so that the contact rod 14 is always moved upward. It is energizing.

In the illustrated example, a gap A corresponding to the thickness of one banknote P to be handled is provided between the rollers 3 and 4, and the rotating body 7 is pressed by a spring 10 at this time. The lower surface at the opposite end of the detection lever 9 that is in contact with the upper end of the contact rod 14 is separated by a gap B.

In FIG. 5, the thickness of the banknote P is a, the thickness of the tape T is b, and the thickness of the square bent portion Pa is 2 in FIG.
When a (a = 85 μ, b = 50 μ) and the gap A = a, the relationship is L2 / L1 · b ≦ B ≦ L2 / L1 · a.

A magnetic member 17 is provided on the upper surface of the end of the detection lever 9 which is in contact with the contact rod 14, and the magnetic head 1 is opposed to the magnetic member 17 with a gap C therebetween.
8 is fixedly provided on the frame 2. The magnetic head 18 is connected to a data collection means 19 and a determination unit 20 to detect and determine an increase in the gap C.

In FIG. 1, reference numerals 21 and 21 denote guide plates for smoothly passing the bills P between the rollers 3 and 4. Rollers 3 and 4 are provided at the ends of the guide plates 21 and 21 on the rollers 3 and 4 side. Grooves 3 formed at regular intervals in the circumferential direction of 4
a, 4a,... are formed.

Next, the operation of the above embodiment will be described. In FIG. 1, when the banknote P enters between the upper and lower rollers 3 and 4 through the guide plates 21 and 21 from the direction of the arrow A, if the banknote P has a normal thickness a, the upper roller 3 is not displaced. The rollers 3 and 4 are sent out from between the rollers 3 and 4 by driving in the direction of the arrow. At this time, no data is detected as in the conventional case, as shown in the case of "only one" in FIG.

When a tape T having a length of about 12 mm in the detection direction is attached to a part of the banknote P as shown in FIG. 4B, the thickness of the portion where the tape T is attached becomes a + b, The rotating body 7 of the upper roller 3 pushes up the detection lever 9 and swings around the shaft 8 in the counterclockwise direction in FIG. At this time, the displacement range of the roller 3 is applied to the detection lever 9 by the spring 10 serving as the first urging means in the displacement range due to the actual thickness.
, And the urging force of the spring 16 as the second urging means also acts on the actual displacement of the roller 3 due to abnormal thickness due to an impact or the like at the time of insertion. The magnetic body 17 is extraly separated from the magnetic head 18 by a distance (B + △ B) substantially equal to the distance B, and a voltage change signal accompanying the extra is input to the data collecting means 19, and the "invention" of FIG. Is detected as the detection length D1 as shown in the case of "1 sheet plus tape" in the column of (1), and the judging section 20 judges that the tape is attached. At this time, the period during which the detection lever 9 swings corresponds to the length of the tape T in the bill transport direction. When a long tape T is stuck as shown in FIG. Therefore, the length can be determined.

When a part of the banknote P has a corner fold Pa of about 5 mm as shown in FIG. 4A, the thickness of the corner fold becomes a × 2. It swings greatly in comparison. By this swing, the lower surface of the end of the detection lever 9 opposite to the spring 10 hits the upper end of the contact rod 14, and
It swings against a spring 16 acting as a second urging means for urging the contact rod 14.

Accordingly, in the case of this square-folded bill, the urging forces of both the springs 10 and 16 as the first and second urging means act, and the detection lever 9 acts on the urging of these springs 10 and 16. 6, the impact data D 'is small and does not continue as shown in the case of "square break" in FIG. 6, and the detection length D2 also remains within the range of the square break Pa.
The length is smaller than the detection length D1 when the tape T of about 12 mm is attached, and it is determined that the banknote is a square-folded banknote. When two sheets are inserted, they are detected in the same manner as in the related art.

In the illustrated embodiment, the amount of displacement of the roller 3 is taken out as the swing of a detection lever 9 pivotally supported on the machine frame 1 and the detection lever 9 is provided with first and second urging means. Has been shown, but if space permits, the shaft 5 of the roller 3 is extended, and the first and second urging means are acted on the extension of this shaft to reduce the amount of displacement. It can be detected and is not limited to the illustrated example. The initial gap A between the rollers 3 and 4 may be zero.

[0027]

According to the present invention, as described above, according to the present invention, only the first urging means operates in the range of displacement of the roller due to the actual thickness in the case of tape-attached paper sheets, and the impact at the time of insertion can be reduced. The second is for the actual displacement of the roller due to abnormal thickness due to
The urging force of the urging means also acts, and in the case of square folded paper sheets, the second urging means acts in addition to the first urging means. Can be made smaller in each case, so that the length of the detection data can be obtained accurately, and the distinction between the case of tape application and the case of corner break can be clearly provided, and only the tape-applied paper sheets are separated and eliminated. It can be made to function very effectively in the use of such as, and the work such as manual separation can be completely eliminated, which can contribute to the improvement of work efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a sheet thickness abnormality detecting device according to the present invention.

FIG. 2 is an explanatory diagram showing a bearing portion of an upper roller in FIG. 1;

FIG. 3 is a right side view of FIG. 1;

4 (A) to 4 (C) are plan views showing examples of forms of paper sheets to be detected, FIG. 4 (A) is a square fold, and FIGS. 4 (B) and 4 (C) are tape views.

FIG. 5 is an enlarged side view showing a thickness relationship between tape sticking of paper sheets and corner bending.

FIG. 6 is a comparison diagram of detection data between the prior art and the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine frame 2 Frame 3, 4 Roller 7 Rotating body 9 Detection lever 10 First urging means (spring) 14 Abutment rod 16 Second urging means (spring) 17 Magnetic body 18 Magnetic head P Banknote Pa Square bend T tape

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 7/12 G07D 9/00 326

Claims (1)

(57) [Scope of request for utility model registration] A displacement detecting means for detecting a displacement of a roller which is displaced in accordance with a thickness of a sheet passing between the rollers; A sheet thickness abnormality detecting device including a sheet thickness abnormality determining unit that determines a sheet thickness abnormality based on the detection data detected by the displacement amount detecting unit; Between the two rollers until the gap between the two rollers is approximately one and a half, which is equivalent to the thickness of one sheet of paper plus the thickness of the tape when a tape or the like thinner than that thickness is affixed to the thickness of one sheet of paper. First urging means for urging in the approaching direction, and second urging means for urging in the same direction as the first urging means when the gap between the rollers is larger than the gap of about one and a half sheets. Thickness difference of paper sheets characterized by comprising biasing means Detection device.